GCN Circular 26429
Subject
LIGO/Virgo S191213g: WHT spectroscopy of candidate counterparts
Event
Date
2019-12-15T00:07:21Z (6 years ago)
From
Morgan Fraser at University College Dublin <morgan.fraser@ucd.ie>
S. Brennan (University College Dublin), T. Killestein (Warwick), M.
Fraser (UCD), P. Jonker (SRON/Radboud University), K. Maguire (TCD), M.
Perez Torres (IAC), report on behalf of the GW@WHT collaboration:
We obtained an optical spectrum of a number of transients discovered by
ZTF (Andreoni et al. GCN 26424) within the localization region of
S191213g (LVC, GCN #26402)
All spectra were obtained on the night of 2019 Dec 14 using the ACAM
instrument mounted on the William Herschel Telescope located on the
Roque de Los Muchachos Observatory, La Palma, Spain.
AT2019wnn / ZTF19acymcna shows strong Halpha emission at z=0.2, which
together with its location in the nucleus of its host galaxy is
consistent with an AGN outburst.
AT2019wni / ZTF19acymcwv is a Type Ia supernova around +10d from maximum
light, at a redshift z=0.09.